The Simpson Strong-Bolt 2 3/4 in. x 10 in. Mechanically Galvanized Wedge Anchor is a heavy-duty, wedge-type expansion anchor built from mechanically galvanized carbon steel for high-load structural connections in exterior environments. Engineered by Simpson for demanding anchoring applications, this anchor delivers reliable holding strength in uncracked concrete and uncracked masonry, and is fully tested in accordance with ACI355.2, AC193, and AC01. Its dual undercutting embossments on each clip segment work together with the wedge-expansion design to achieve secure mechanical interlock, making it a trusted solution for critical horizontal, vertical, and overhead installations where both load performance and corrosion resistance are required.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the anchor during driving so threads stay clean and fasteners seat correctly every time.
• Dual undercutting embossments on each clip segment - increase mechanical engagement with the concrete or masonry substrate for stronger, more consistent holding performance.
• Suitable for horizontal, vertical, and overhead applications - gives installers flexibility to use a single anchor type across multiple orientations on the same job.
• Mechanically galvanized carbon steel construction - provides corrosion resistance suited for exterior structural anchoring where weather exposure is a factor.
• Standard (ANSI) fractional sizes - fits standard fixtures and installs with common drill bit and tool sizes, reducing the need for specialty equipment on the jobsite.
• Tested per ACI355.2, AC193, and AC01 - independently verified performance in uncracked concrete and uncracked masonry gives engineers and inspectors the documentation they need for code-sensitive projects.
• Installs with a 3/4 in. drill bit and 1-1/8 in. wrench - matching drill and anchor diameter simplifies hole prep and keeps the installation process straightforward.

Why This Product

• Built for exterior high-load anchoring - the mechanically galvanized finish combined with a wedge-expansion design makes this anchor specifically suited for structural connections in outdoor and corrosion-prone environments, not just general-purpose fastening.
• Verified across multiple substrates and standards - with testing per ACI355.2, AC193 for uncracked concrete, and AC01 for uncracked masonry, this anchor supports projects where documented compliance with engineering and code requirements is non-negotiable.
• Versatile installation without specialty tooling - compatibility with standard ANSI fractional tooling and the ability to anchor in horizontal, vertical, and overhead positions means one anchor handles a wide range of structural attachment scenarios.
• Engineered details that simplify the install - the chamfered top prevents mushrooming during driving and the dual undercutting clip embossments are consistent with the proven Strong-Bolt 2 design, reducing the risk of installation errors on critical connections.

Specifications

• Size: 3/4 in. x 10 in.
• MPN: STB2-75100MGF8
• Brand: Simpson Strong-Tie
• Anchor Type: Wedge-Type Expansion Anchor
• Material: Carbon Steel
• Coating / Finish: Mechanically Galvanized
• Anchor Body: Mechanically Galvanized Carbon Steel
• Nut: Carbon Steel ASTM A 563, Grade A
• Washer: Carbon Steel ASTM F844
• Clip: Carbon Steel ASTM A 568
• Diameter: 3/4 in.
• Length: 10 in.
• Thread Length: 6 in.
• Required Drill Bit Size: 3/4 in.
• Required Wrench Size: 1-1/8 in.
• Standards / Testing: ACI355.2, AC193 (uncracked concrete), AC01 (uncracked masonry)
• Packaging: Packs of 8 and Cartons of 40

Approved Applications

• Exterior structural anchoring requiring a high-load-resisting anchor
• Horizontal installations
• Vertical installations
• Overhead installations
• Uncracked concrete substrates (tested per AC193)
• Uncracked masonry substrates (tested per AC01)

Frequently Asked Questions

What size drill bit and wrench are needed to install this anchor?

This anchor installs with a 3/4 in. drill bit and requires a 1-1/8 in. wrench size for tightening.

Is this anchor suitable for outdoor or exterior applications?

Yes. The mechanically galvanized carbon steel finish is specifically suited for exterior applications where corrosion resistance is required.

What substrates has this anchor been tested in?

The STB2-75100MGF8 has been tested in uncracked concrete in accordance with AC193 and in uncracked masonry in accordance with AC01. It is also tested per ACI355.2.

Can this anchor be used in overhead or horizontal installations?

Yes. The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications.

Note: Product dimensions and/or thread length may differ from picture. Please refer to the specifications listed above for accurate details.